US4574217A - Incandescent lamp and base - Google Patents
Incandescent lamp and base Download PDFInfo
- Publication number
- US4574217A US4574217A US06/466,284 US46628483A US4574217A US 4574217 A US4574217 A US 4574217A US 46628483 A US46628483 A US 46628483A US 4574217 A US4574217 A US 4574217A
- Authority
- US
- United States
- Prior art keywords
- lamp
- base
- ceramic
- envelope
- base part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
- H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
Definitions
- the improved three-part base for said type lamp is formed of an electrically insulated material joined together in butt-seal engagement along horizontal planes parallel to each other and transverse to the longitudinal lamp axis with an upper base part having a central cavity opening in which the press seal end of the lamp is supported and a lower base part having a passageway for a pair of electrical conductors connected to the lamp inleads, said base parts being spaced apart and joined together with an intermediate base part also containing a passageway for said pair of electrical conductors.
- said improved base is formed of ceramic material with all base parts being joined together with ceramic sealing material before final lamp assembly.
- a representative incandescent lamp utilizing the presently improved three-part base construction thereby comprises:
- a three-part base for said lamp formed of electrically insulative material joined together in butt-seal engagement along horizontal planes transverse to the longitudinal lamp axis with an upper base part having a central cavity opening in which the press seal end of said lamp is supported and a lower base part which contains a passageway for said externally extending termination conductors, said base parts being spaced apart with an intermediate base part also containing a passageway for said externally extending termination conductors.
- the vitreous envelope is glass and refractory metal inleads are employed, generally tungsten metal, which are further joined to larger diameter termination conductors disposed in the lamp base.
- the principal advantages of the present three-part base construction are best illustrated in tungsten halogen cycle type incandescent lamps of relatively high wattage requiring that the lamp base be constructed with a ceramic material to provide the required strength, thermal endurance and electrical insulative properties for lamp operation over extended time periods.
- This type incandescent lamp has widespread use in studio, theater, and television lighting applications.
- the high wattage rating of such lamps up to around 2,000 watts, has required that the ceramic base construction be of a relatively heavy nature to provide adequate physical support for a relatively large size lamp envelope containing a multifilament, resistive element and associated mount and with a further metal base shell being secured to said ceramic base serving as structural means to optically focus the lamp filament.
- a two-piece metal base construction can be employed having an inner shell member directly bonded to the exterior surface of the lower ceramic base part and which is inserted into an outer shell member for a predetermined distance related to the optical focus of said lamp filament.
- a typical lamp of this general type incorporating the presently improved part ceramic base comprises:
- the improvement comprises having three base parts sealed together in butt-seal engagement along a horizontal plane transverse to the longitudinal lamp axis by means of ceramic sealing material, said ceramic base comprising an upper base part having a central cavity opening in which the press seal end of said lamp is supported and a lower base part which contains a passageway for said externally extending termination conductors, said base parts being spaced apart with an intermediate base part also containing a passageway for said externally extending termination conductors; and
- the ceramic sealing material that is disposed in the central cavity of said improved lamp base member provides substantial physical support to the lamp envelope end inserted into the central cavity by reason of the free space not being occupied by said lamp envelope end.
- an inner metal base shell by conventional bonding means, such as a lamp having cement. Said inner base shell is then inserted into an outer metal base shell to a depth establishing a predetermined distance between the center of the lamp filament along the longitudinal lamp axis and a reference or datum plane established with further structure of said outer base shell.
- mounting a flange element provided on said outer metal base shell can be used as the means to locate the filament a predetermined fixed distance therefrom in said final lamp assembly whereupon each lamp assembly manufactured in such manner will have the same focal point when installed in a lamp fixture.
- prefocusing means there is avoided any need to refocus a replacement lamp assembly when employed for such end product applications as studio lighting, spotlights, and the like.
- FIG. 1 is a plan view of a tungsten halogen cycle lamp produced in accordance with the invention.
- FIG. 2 is a more detailed plan view of the three-part base member employed in the FIG. 1 lamp embodiment before said parts have been assembled together.
- a representative tungsten-halogen cycle lamp 1 corresponding to a 1,000 watt, 120-volt size is illustrated which comprises a vitreous quartz glass envelope 2 of tubular form that encloses a multifilament incandescent lamp coil 4 which is suspended from a conventional filament mount 6.
- a pair of refractory metal inleads 8 and 10 provides the means of furnishing electrical energy to said filament coil which are hermetically sealed at one end of the tubular-shaped lamp glass envelope by a direct vacuum-type pinch seal 12 and with the opposite ends of said lead-in wires being joined to conventional foil elements 14 and 16, respectively, to insure that vacuum-type sealing takes place.
- two pair of larger diameter inlead wires 18 and 20 that are fixed to each of said foil elements to form part of the physical support structure of said lamp and which need not necessarily be hermetically sealed in the lamp construction.
- Said pair of larger diameter inlead wires are fixed at the opposite end to an externally extending pair of termination conductors 22 and 24, respectively, which are electrically connected in the conventional manner to a two-piece metal base construction 26.
- An inner base shell 27 secured to the ceramic base member 28 of the present invention engages an outer base shell 29 having a flange element 30.
- Said ceramic base member 28 is of a three-part construction with upper part 32 including a central cavity opening 34 in which the press seal end 12 of said lamp is disposed allowing a free space 36 to remain in said cavity which is thereafter filled with ceramic sealing material 38 to secure the lamp envelope in the assembled base member along with providing substantial physical support to the lamp envelope in the assembled lamp.
- Lower ceramic base part 40 is spaced apart from said upper base part 32 by engagement with intermediate base part 42, and with both of said latter base parts having longitudinal passageways 44 and 45, respectively, which extend entirely therethrough for emergence of the termination conductors.
- the assembled base parts are shown to be joined together at parting lines 46 and 47 and which further depicts the butt-seal engagement therebetween shown in phantom relief at 48 and 49, respectively.
- FIG. 2 there is shown in plan view the unassembled upper, lower and intermediate base parts 32, 40 and 42, respectively, of the above described base member 28 in the FIG. 1 lamp embodiment.
- Said upper base part 32 includes the central cavity 34 which supports pressed seal end 12 of the lamp when disposed therein and which has been shown for illustration purposes in perspective relief.
- a free space 36 and 36' exists on either side of said lamp envelope end after insertion into said cavity to enable ceramic sealing material (not shown) to be disposed in this free space during the final lamp assembly.
- Said ceramic material not only secures the lamp envelope to the assembled base in said manner but generally also flows downwardly into the central passageway area 44 of the intermediate base part 42 to electrically insulate the externally extending termination conductors 22 and 24 as well.
- intermediate base part 42 includes top sealing rim 50 for butt-seal engagement with said upper base part at parting line 46 when these two parts are joined together, preferably before final lamp assembly, with a ceramic sealing material (not shown).
- lower base part 40 includes central passageway 45 and engages said intermediate base part 42 at parting line 47 with its top sealing rim 52.
- assembly of the three-part base occurs in a pair of horizontal planes transverse to the lamp longitudinal axis and with physical registration between said base parts being provided with grooved portions located at the bottom edges of the upper and intermediate base parts.
- said base parts be all joined together with ceramic sealing material which can be carried out in a single firing operation used to sinter the ceramic base parts in order to reduce the number of processing steps in lamp manufacture.
- the two-piece metal base shell construction illustrated for said lamp embodiment can thereafter be secured to the assembled ceramic base after assembly of the lamp member thereto, all in a conventional manner to complete the final lamp manufacture.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/466,284 US4574217A (en) | 1983-02-14 | 1983-02-14 | Incandescent lamp and base |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/466,284 US4574217A (en) | 1983-02-14 | 1983-02-14 | Incandescent lamp and base |
Publications (1)
Publication Number | Publication Date |
---|---|
US4574217A true US4574217A (en) | 1986-03-04 |
Family
ID=23851190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/466,284 Expired - Lifetime US4574217A (en) | 1983-02-14 | 1983-02-14 | Incandescent lamp and base |
Country Status (1)
Country | Link |
---|---|
US (1) | US4574217A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4897573A (en) * | 1984-07-03 | 1990-01-30 | U.S. Philips Corporation | Electric incandescent lamp having discharge arc conductor and discharge arc interruption fuse |
US5575459A (en) * | 1995-04-27 | 1996-11-19 | Uniglo Canada Inc. | Light emitting diode lamp |
US20040165377A1 (en) * | 2001-08-16 | 2004-08-26 | Anthony Maglica | Flashlight with an aligned lamp bulb |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3356984A (en) * | 1965-01-12 | 1967-12-05 | Duro Test Corp | Electric lamp mounting |
US3852631A (en) * | 1973-08-20 | 1974-12-03 | Gen Electric | Incandescent lamp and base |
US4033776A (en) * | 1975-08-18 | 1977-07-05 | Saxonburg Ceramics, Inc. | Composition of ceramic material |
US4084112A (en) * | 1977-05-20 | 1978-04-11 | Gte Sylvania Incorporated | Incandescent lamp having two-part insulative base |
US4100448A (en) * | 1977-05-02 | 1978-07-11 | General Electric Company | Lamp and socket assembly |
US4126810A (en) * | 1976-06-01 | 1978-11-21 | General Electric Company | Ceramic base for glass halogen lamps |
US4238705A (en) * | 1979-09-12 | 1980-12-09 | General Electric Company | Incandescent lamp seal means |
US4287448A (en) * | 1979-07-16 | 1981-09-01 | General Electric Company | Mechanical stop means for a prefocused plastic PAR lamp |
US4499404A (en) * | 1982-08-05 | 1985-02-12 | General Electric Company | Incandescent lamp with ceramic base |
-
1983
- 1983-02-14 US US06/466,284 patent/US4574217A/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3356984A (en) * | 1965-01-12 | 1967-12-05 | Duro Test Corp | Electric lamp mounting |
US3852631A (en) * | 1973-08-20 | 1974-12-03 | Gen Electric | Incandescent lamp and base |
US4033776A (en) * | 1975-08-18 | 1977-07-05 | Saxonburg Ceramics, Inc. | Composition of ceramic material |
US4126810A (en) * | 1976-06-01 | 1978-11-21 | General Electric Company | Ceramic base for glass halogen lamps |
US4100448A (en) * | 1977-05-02 | 1978-07-11 | General Electric Company | Lamp and socket assembly |
US4084112A (en) * | 1977-05-20 | 1978-04-11 | Gte Sylvania Incorporated | Incandescent lamp having two-part insulative base |
US4287448A (en) * | 1979-07-16 | 1981-09-01 | General Electric Company | Mechanical stop means for a prefocused plastic PAR lamp |
US4238705A (en) * | 1979-09-12 | 1980-12-09 | General Electric Company | Incandescent lamp seal means |
US4499404A (en) * | 1982-08-05 | 1985-02-12 | General Electric Company | Incandescent lamp with ceramic base |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4897573A (en) * | 1984-07-03 | 1990-01-30 | U.S. Philips Corporation | Electric incandescent lamp having discharge arc conductor and discharge arc interruption fuse |
US5575459A (en) * | 1995-04-27 | 1996-11-19 | Uniglo Canada Inc. | Light emitting diode lamp |
US20040165377A1 (en) * | 2001-08-16 | 2004-08-26 | Anthony Maglica | Flashlight with an aligned lamp bulb |
US6991360B2 (en) * | 2001-08-16 | 2006-01-31 | Mag Instrument, Inc. | Flashlight with a light source aligned with a reflector axis |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0422935B1 (en) | Reflector lamp unit with improved lamp mount | |
US4603278A (en) | Electric lamp with insulating base | |
EP0066783B1 (en) | Arc discharge lamp | |
US3622832A (en) | Interchangeable tungsten halogen lamp | |
CA1246133A (en) | Tungsten halogen lamp with heat-dissipating base | |
US4126810A (en) | Ceramic base for glass halogen lamps | |
US4785218A (en) | Tungsten halogen lamp base | |
JPS62186459A (en) | Electric lamp | |
EP0364831B1 (en) | Electric incandescent lamp and method of manufacture therefor | |
US4724353A (en) | Electric lamp with insulating base | |
US4574217A (en) | Incandescent lamp and base | |
US4489252A (en) | Electric lamp | |
US4084112A (en) | Incandescent lamp having two-part insulative base | |
US4499404A (en) | Incandescent lamp with ceramic base | |
US5659222A (en) | Vacuum sealed incandescent lamp with improved filament support structure | |
US3417367A (en) | Incandescent lamp base | |
US3622947A (en) | Lamp base extension | |
US5272409A (en) | Capped lamp/reflector unit | |
US5187405A (en) | Double filament incandescent lamp | |
EP0465198A2 (en) | Reflector lamp | |
US6163102A (en) | Reflector-type lamp assembly having a multi-purpose closure member | |
US4490646A (en) | Halogen cycle incandescent lamp having an intermediate lead-in conductor part | |
US3875443A (en) | Incandescent lamp | |
US5138226A (en) | Surface mountable miniature incandescent light | |
JPH03179658A (en) | Compact reflection type lamp unit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GENERAL ELECTRIC COMPANY; A CORP OF NY. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PENDERGRASS, EDWARD A.;REEL/FRAME:004095/0595 Effective date: 19830210 Owner name: GENERAL ELECTRIC COMPANY; A CORP OF NY., NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PENDERGRASS, EDWARD A.;REEL/FRAME:004095/0595 Effective date: 19830210 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |